This Land Was Made To Sue You and Me

A very funny musical parody of the upcoming American election has been taking the Internet by storm. The parody is of the classical Guthrie song (This Land Is Your Land) with special Bush vs. Kerry lyrics. The flash animation is available from jibjab.com. Now, the owners of the original Guthrie song are upset and are threatening legal action due to copyright infringement. I remember from when I was a kid a Canadian children's musical group called the Travellers. They had made their own version of the Guthrie song, with Canadian specific lyrics. I wonder if they had paid royalties, otherwise they may find themselves in trouble too. Update:

I found some information on The Travellers. It has the following tidbit:

Their signature song is a Canadian adaptation of Woody Guthrie's 'This Land Is Your Land'.